selective function

[Mahmoud_El.Attar]

I have two tables and i want to make a formula that way

When B=E then A=Fasking.xlsx

[Ace_XL]

You have trailing spaces in Col E. Either remove those by using the TRIM function and use
In B3
=INDEX(F:F,MATCH(B3,E:E,0))
Copy down

or use
=INDEX(F:F,MATCH(B3,TRIM(E:E),0))
Confirm with Ctrl+Shift+Enter and not just Enter

[Mahmoud_El.Attar]

Both formulas didn't work